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(Click for frequent words.) 67 orbiting satellites 66 satellites 61 satellites orbiting 59 Global Positioning Satellites 59 Earth orbiting satellites 58 GPS 58 Global Positioning System 57 geostationary satellites 56 Galileo satellites 56 GPS IIF satellites 56 Milstar 55 satellite 55 GPS receiver 55 GPS constellation 54 NAVSTAR GPS 54 Block IIF 54 Globalstar constellation 54 geosynchronous satellites 54 geosynchronous 54 ephemeris 53 satellite constellation 53 NAVSTAR Global Positioning System 53 Wideband Global 53 TDRSS 53 polar orbiting satellites 52 orbiting telescope 52 NAVSTAR 52 satellites orbiting Earth 52 antennas 52 Navstar GPS 52 optical telescopes 52 Galileo constellation 52 GPS IIIA 51 positioning satellites 51 Iridium satellites 51 GPS IIF 51 polar orbiting 51 Meteorological Satellite 51 SBIRS 51 geosynchronous orbits 51 geo stationary satellites 51 earth orbiting satellites 51 inertial navigation 51 gyroscopes 51 GLONASS 51 SBAS 51 Glonass 51 geostationary satellite 51 JTRS radios 50 GLONASS satellites 50 QZSS 50 MUOS satellites 50 geosynchronous satellite 50 FamilyMap 50 EPLRS 50 Mars Odyssey spacecraft 50 QuikSCAT 50 GNSS receivers 50 cell tower triangulation 50 geo stationary satellite 50 geostationary orbits 50 datalinks 50 LEO satellites 50 GNSS 50 geo synchronous orbit 50 GOES satellites 50 Milstar satellite 50 INSAT 4B 50 Iridium satellite 49 Milstar II 49 orbiter Mars Odyssey 49 Milstar satellites 49 GPS Block IIF 49 GLONASS constellation 49 SBSS satellite 49 L5 signal 49 radio occultation 49 TanDEM X 49 MUOS 49 Doppler radars 49 antenna 49 Synthetic Aperture Radar 49 Gorgon Stare 49 TerraSAR X 49 laser rangefinder 49 AEHF 49 orbit GEO 49 Adaptive optics 49 Program DMSP 49 National Polar Orbiting 49 telescope 49 Global Surveyor 49 Space Fence 49 Skynet 5C 49 Milstar constellation 49 directional antenna 49 WGS satellites 49 MUOS satellite 49 GPS IIF satellite 49 geo stationary orbit 48 Surveillance System STSS 48 TDRS K 48 orbit spares 48 Helios 2B 48 Glonass navigation 48 spacecraft 48 CHIPSat 48 Satellites GOES 48 SBSS Block 48 orbiting Mars 48 GOCE 48 airborne shipboard 48 Anik F1 48 spaceborne 48 highly elliptical orbit 48 synthetic aperture radars 48 Fastrax GPS 48 DGPS 48 AMF JTRS 48 Letter Logger 48 geostationary 48 WGS satellite 48 SiRFInstantFixII 48 U TDOA 48 GPS GLONASS 48 infrared telescopes 48 narrowband tactical 48 NASA Landsat 48 STSS satellites 48 Differential GPS 48 Predator UAV 48 radars 47 Mojix STAR 47 Selective Availability 47 RADARSAT 2 47 BFT HC 47 sensors 47 Advanced LIGO 47 LORAN 47 Intelsat satellites 47 SkyRouter 47 reconnaissance satellites 47 SiRFstarIII architecture 47 interplanetary spacecraft 47 aboard ESA Envisat 47 Yahsat 1A 47 telescopes 47 nexgen 47 VINASAT 47 laser designators 47 EA 6B 47 meteorological satellites 47 Mars orbiters 47 homing beacons 47 Herschel Planck 47 satelites 47 Orbital Express 47 System F6 47 SiRF chipset 47 Trimble GNSS 47 GIOVE B 47 GPS IIR M 47 Augmentation System WAAS 47 Inertial Navigation System 47 Glonass K 47 NFIRE 47 ELTs 47 Hubble gyroscopes 47 Cosmic Origins Spectrograph 47 EKV 47 Mars Pathfinder lander 47 atmospheric disturbances 47 Skyhook Wi Fi 47 radar altimeter 47 TDRS satellites 47 CALIPSO 47 detect gravitational waves 47 sensor 47 fainter objects 47 Ultrasonic sensors 47 Mars landers 47 eLoran 47 parabolic antennas 47 spy satellites 46 robotic spacecraft 46 compass headings 46 NPOESS 46 Glonass satellites 46 SATCOM WGS 46 orbiting spacecraft 46 CALIPSO satellites 46 Globalstar satellite 46 MONAX 46 Cosmic Origins Spectrograph COS 46 THEMIS satellites 46 Advanced EHF satellite 46 precision GNSS 46 seismometers 46 GSM WCDMA handsets 46 Inertial Navigation 46 WAAS 46 COSMO SkyMed 46 electro optical sensor 46 Landsat satellite 46 atomic clocks 46 geostationary earth 46 reconnaissance orbiter 46 MTSAT 1R 46 Insat 4B 46 orbiting observatories 46 GPS IIR 46 geosynchronous communications 46 planetary Transits 46 GOES R 46 WISE spacecraft 46 radars telemetry 46 interferometers 46 geostationary communications 46 Meteosat 46 highly elliptical orbits 46 IMUs 46 Phased array 46 JSTARS 46 Insat 2E 46 WAAS GPS 46 Block IIR 46 interferometric synthetic aperture radar 46 transponders 46 GPS 2R 46 NOAA GOES 46 FBCB2 46 Landsat satellites 46 System GNSS 46 GPS SBAS 46 cellular triangulation 46 ultrasonic sensors 46 datalink 46 Mobile User Objective 46 Werthimer 46 Global Positioning Systems 46 C NOFS 45 observatories 45 flyby spacecraft 45 EGNOS 45 infra red sensors 45 SIM PlanetQuest 45 JPALS 45 THAAD radar 45 Mars Surveyor 45 spacecrafts 45 RTK GPS 45 orbiters 45 Minuteman IIIs 45 telemetry 45 emergency locator transmitters 45 GPS L2C 45 UAVSAR 45 Resourcesat 2 45 Uninhabited Aerial Vehicle 45 scatterometer 45 GPS IIR satellites 45 laser designator 45 Kurs automated 45 GLONASS navigation 45 Spirent GSS# 45 Trimble VRS 45 JWST 45 gamma ray detectors 45 LRO spacecraft 45 SARSAT 45 ESA Planck 45 FORMOSAT 45 mechanically scanned 45 troposcatter communications 45 Stratellite 45 X ray telescopes 45 cosmic microwave radiation 45 Mars Orbiter 45 Climate Experiment GRACE 45 System ILS 45 geo synchronous satellites 45 Titan flyby 45 Based Augmentation System 45 Transformational Satellite Communications 45 electro optical sensors 45 GLONASS signals 45 geosynchronous GEO 45 Falcon III AN/VRC-# 45 ALMA antennas 45 GLONASS M 45 Antenna LISA 45 System MUOS 45 synthetic aperture radar 45 GSLV rockets 45 troposcatter 45 Fomalhaut b 45 Giove B 45 VOR ILS 45 System Block IIR 45 GEO satellites 45 Ariane launcher 45 KVH FOGs 45 CitySense 45 remote sensing satellites 45 AEHF satellite 45 e MERLIN 45 inertial guidance 45 orbiting telescopes 45 Satellite System TDRSS 45 interferometer 45 GPS IIIA satellite 45 geo synchronous 45 Real Time Kinematic 45 eLORAN 45 DSCS III 45 Iridium 45 streamgages 45 Yarkovsky effect 45 CBERS 45 precise atomic clocks 45 Precision Approach 45 InvisiTrack LS 45 carry heavier payloads 45 spacecraft orbiting 45 VINASAT 1 45 DTCS 45 SINCGARS 45 orbiting Hubble Space Telescope 45 Globalstar satellites 45 Navy F/A-#E/F 45 GNSS receiver 45 tower triangulation 45 DAGR 45 Spaceguard Survey 44 AFSCN 44 KC #Rs 44 inertial measurement unit 44 RapidEye constellation 44 AEHF satellites 44 ESA Envisat satellite 44 NROL 44 SIRTF 44 APXS 44 AN/PRC-# C radios 44 DigitalGlobe WorldView 44 Wideband Gapfiller Satellite 44 directional antennas 44 robotic rovers 44 Palapa D 44 ProtoStar II 44 INSAT 4CR 44 Geostationary 44 ASTRA 5B 44 infrared 44 localizer 44 Thales Alenia 44 Solar Orbiter 44 electro optic sensors 44 unmanned probes 44 UASs 44 inhabitable planets 44 GOES N 44 INSAT 3A 44 Advanced EHF 44 Wideband Gapfiller 44 Global Positioning Satellite 44 Oceansat 2 44 WFC3 44 Ku Band 44 Inmarsat satellites 44 Rosetta orbiter 44 transmitter 44 ionospheric 44 Minotaur rocket 44 SPACEWAY 3 44 GPS IIIB 44 Earth Observation satellites 44 MetOp 44 geophone 44 #dBm [001] 44 Space Interferometry Mission 44 Anik F2 44 NASA THEMIS 44 fix TTFF 44 UAVs 44 radiosondes 44 Turksat 4A 44 multipurpose Arirang 3 44 C4I systems 44 SBIRS HEO 44 Kepler spacecraft 44 incoming ballistic missiles 44 geosynchronous orbit 44 Michibiki 44 submillimeter wavelengths 44 Wide Area Augmentation 44 XTAR EUR 44 Epsilon Eridani 44 QuikScat 44 infrared sensors 44 Cospas Sarsat 44 omni directional antennas 44 laser altimeter 44 Meteosat satellites 44 Skynet 5B 44 Foton spacecraft 44 unpiloted aircraft 44 DMSP satellites 44 Laura Grego 44 AeroAstro 44 Faint Object 44 solar flares 44 AgCam 44 Mars Odyssey 44 INSAT satellites 44 inertial sensor 44 Synthetic Aperture Radar SAR 44 dismounted soldier 44 ARISSat 44 Selective Availability Anti Spoofing 44 electric ion propulsion 44 CARTOSAT 44 GOES O 44 airborne ISR 44 microshutters 44 TacSat 44 SMOS mission 44 sonars 44 Launched Successfully 44 GAGAN 44 telemetry tracking 44 Beidou satellite 44 Highly Adaptable Satellite 44 Mars Odyssey orbiter 44 Earth orbiting spacecraft 44 Hubble 44 EarthScope 44 F/A-# fighters 44 AN/VRC-# 44 Cryosat 44 CloudSat 44 Control Segment OCX 44 MAINGATE 44 Comet Churyumov Gerasimenko 44 Mars orbiter 44 sensor payloads 44 Advanced Synthetic Aperture 44 Metop 44 Burst Alert 44 transmitters 44 Satellites 44 STSS Demonstration 44 optical wavelengths 44 Global Navigation Satellite 44 Predator unmanned aircraft 44 Inertial Navigation Systems 44 MILSATCOM 44 RTK correction 44 Advanced EHF satellites 43 radar scopes 43 alien civilizations 43 Mars rovers 43 G ATOR 43 GB GRAM 43 NuSTAR 43 AGPS 43 Envisat satellites 43 Cassini orbiter 43 Glonass M 43 ALMDS 43 SiRFstarIV architecture 43 TerraSAR X satellite 43 geopositioning 43 synthetic aperture 43 Infrared Pathfinder Satellite 43 Terrestrial Planet Finder 43 INSAT 4A 43 JPSS 43 LORRI 43 geolocate 43 INSAT satellite 43 geolocating capabilities 43 deorbit burn 43 FAA NextGen 43 TecSAR 43 Planetary Camera 2 43 INSAT 2E 43 steerable beam 43 move COTM 43 MEO satellites 43 polar orbits 43 adaptive optics 43 DKET 43 thruster firings 43 Phoenix Mars lander 43 MQ 9s 43 COMINT 43 planetary orbits 43 EELVs 43 Trimble VRS TM 43 Ikonos 43 irregularly shaped asteroid 43 Hubble orbits 43 millimeter wave radar 43 OrbView 3 43 SAASM 43 Assisted GPS AGPS 43 WGS Block 43 manpack radio 43 Hubble Telescope 43 Hubble telescope 43 inertial reference 43 Beidou navigation 43 INSAT 3D 43 deformable mirror 43 CDL Hawklink 43 NEXRAD 43 diazepam pharmacy 43 Nasa spacecraft 43 radiometers 43 QuikScat failed 43 Boeing #HP 43 GPS enabled 43 RISAT 43 Field Infrared Experiment 43 Tactical Tomahawk 43 Gyroscopes 43 GRACE satellites 43 gamma ray observatory 43 resonance frequency 43 Landsat 43 E 8C 43 Navigation Satellite 43 Keck telescope 43 millimeter wave MMW 43 GPS Global Positioning 43 DMSP F# 43 ENVISAT 43 atmospheric turbulence 43 TSAT 43 stealth cruise missiles 43 MAVs 43 GIS remote sensing 43 orbiting 43 NASA Lunar Crater 43 WFPC2 43 wideband networking 43 inertial navigation system 43 spinning gyroscopes 43 O OREOS 43 Herschel telescope 43 steerable beams 43 Convection Rotation 43 twin rovers Spirit 43 electromagnetic signals 43 Arabsat 5A 43 SBIRS GEO 43 Cloud Aerosol Lidar 43 JCSAT 9 43 satID 43 ASTRA 5A 43 ICESat 43 ion thruster 43 radiosonde 43 AIM #D 43 Resourcesat 43 remotely piloted aircraft 43 EP 3E 43 Navman marine 43 IBEX spacecraft 43 Geographical Positioning System 43 LORAN C 43 aimpoint 43 extraterrestrial civilizations 43 Galaxy 4R 43 NASA EPOXI mission 43 Shadow TUAS 43 terrestrial transmitters 43 Hipparcos 43 NFIRE satellite 43 VHF 43 #P/Churyumov-Gerasimenko 43 TDRS 43 Earth Observation EO 43 Cooning 43 HiRISE camera 43 orbital insertion 43 Iridium NEXT satellites 43 ultrasonic sensor 43 UHF radios 43 COROT 43 Laura Schlessinger shifts 43 JCSAT 43 Navy MH #R 43 robotic explorers 43 GPS GNSS 43 transiting planets 43 STEREO spacecraft 43 MARSIS radar 43 Auto GCAS 43 GBIs 43 Ocean Salinity SMOS 43 neutrino detectors 43 ballistic missiles cruise missiles 43 megahertz frequency 43 AN/PRC-#F 43 submillimeter wavelength 43 OmniTRACS 43 GPS Block IIR 43 meter Keck telescope 43 Joint STARS 43 Solar Terrestrial Relations 43 SAR Lupe 43 Alphasat 43 pad #A 43 Telogis Fleet 43 Insat 4CR 43 A# spacecraft 43 LAGEOS 43 bi directional amplifiers 43 transceiver 42 MDA Ballistic Missile 42 RazakSAT 42 Beidou 42 Network DSN 42 phasor measurement units 42 Eutelsat KA SAT 42 NextView 42 accurate atomic clocks 42 Block IIR M 42 LCROSS spacecraft 42 Ted Gavrilis 42 NASA ICESat 42 downlinks 42 guided munitions 42 orbiting Saturn 42 Gravity Probe B 42 Orbiting Carbon Observatory 42 SPACEWAY TM 42 POES satellites 42 Telstar #R 42 hydrogen maser 42 Navigation Satellite System 42 geomagnetic storms 42 LADAR 42 Cartosat 2B 42 airborne observatory 42 Egnos 42 frequency VLF 42 KazSat 42 AESA radar 42 Polar Epsilon 42 IKONOS 42 dropsonde 42 tumbleweed rover 42 Iridium NEXT 42 AERONET 42 NIRSpec 42 NASA Far Ultraviolet 42 polarimetry 42 Vinasat 42 Anik F3 42 Wideband Networking Waveform 42 volcanic plumes 42 lidar instrument 42 Crewmate Tracy Caldwell 42 TACNAV 42 NPOESS Preparatory Project 42 unmanned reconnaissance aircraft 42 Geo IK 42 Mars Reconnaissance Orbiter MRO 42 Pan STARRS telescope 42 infrared astronomy 42 NanoSail D 42 loran 42 unmanned spaceplane 42 GPS CS1 42 European Geostationary Navigation 42 shuttle thrusters 42 AfriStar 42 Pan STARRS 42 Jovian moons 42 ASDE X 42 Impeva 42 MHz ELT 42 Fermi telescope 42 MEXSAT 42 Cartesian coordinates 42 Block IIIA 42 Intelsat IS 42 Ariane rocket 42 orbital 42 UHF frequencies 42 Interior Laboratory GRAIL 42 ionosphere 42 radial velocity 42 Advanced Extremely 42 orbital velocity 42 MSAT G2 42 HiRISE camera aboard 42 NESDIS 42 sodar 42 Telesat Nimiq 42 Doppler radar 42 HEO payload 42 MQ 1B Predator 42 transponder 42 ALQ 42 ASTRA 1G 42 lunar perigee 42 Turksat 3A 42 Insat 42 CBERS 2B 42 LIDAR 42 Keck telescopes 42 ILS 42 AMPERE 42 AN/ALQ-# 42 MARSIS 42 Iridium #A 42 Satellite Aided Tracking 42 SPHERES 42 Ted Molczan Canadian 42 navigational beacons 42 X ray observatories 42 exoplanets planets 42 Earth Asteroid 42 pico cell 42 microsatellites 42 transceivers 42 SAR GMTI 42 UHF VHF 42 Joint Tactical 42 orbiting observatory 42 interferograms 42 RRATs 42 IRNSS 42 GSM W CDMA 42 Planck satellite 42 UCAVs 42 geoid 42 TrueFocus 42 SATCOM Satellite 42 entire Milstar constellation 42 E/A-#G 42 CORS 42 infrared laser 42 ROCSAT 2 42 remote sensing 42 Lunar Reconnaissance Orbiter LRO 42 DART spacecraft 42 Air Launched Decoy 42 fiber optic gyros 42 waveforms 42 ROSAT 42 Ocean Salinity 42 AWACS radar 42 SiRFstar 42 On Ramp ULP 42 Chang'eI 42 AirLaunch 42 GSAT 5P 42 LinkControl 7 42 interferometric observations 42 operationally responsive space 42 LANTIRN 42 ion thrusters 42 Odyssey orbiter 42 Global Differential GPS 42 satellites orbiting Mars 42 hyperspectral imager 42 LIGO 42 Observatory SDO 42 WISE infrared 42 SiRFstarIII 42 infrared sensing 42 JTRS GMR 42 downlink 42 Webb Telescope 42 ST5 42 infra red imaging 42 Viking landers 42 sunspot cycle 42 GPS IIIA satellites 42 Martian rovers 42 Intelsat Galaxy 42 iPSTAR broadband 42 TruLink 42 W3B satellite 42 microwave transmitters 42 robotic lander 42 RDS TMC 42 GSTB V2 42 GE CF6 engines 42 imager 42 command destruct 42 SMOS 42 Wilkinson Microwave Probe 42 TeleNav GPS 42 comets asteroids 42 ESO VLT 42 substorms 42 terahertz frequencies 42 HEO payloads 42 ScanEagle 42 EchoStar XIV 42 EADS Astrium GmbH 42 GPS Pathfinder ProXRT 42 Compton Gamma Ray 42 gamma ray observatories 42 Geostationary Operational Environmental 41 gyroscope 41 HAMSAT 41 USGS Landsat 41 BTS Master MT#B 41 geostationary orbit 41 nanosatellites 41 Instrument Landing System 41 ESOC 41 Meteorology Ionosphere 41 RADARSAT 41 antenna reflector 41 amplifier adapter 41 TomTom LINK 41 rubidium clocks 41 Constellation Observing 41 deorbiting 41 ESA ERS 41 Doppler shift 41 localiser 41 TrimTrac 41 Keck Telescopes 41 COM DEV 41 inbuilt GPS 41 Passive tags 41 SatMAX ® 41 exo atmosphere 41 latitude longitude 41 ICO G1 satellite 41 Planck telescope 41 JTRS approved 41 secure timing SAASM 41 Ka band 41 Galaxy #R 41 Atomic clocks 41 kinetic warhead 41 VeeLo NextGen 41 Optus D1 41 satcom 41 High Frequency EHF 41 radiometer 41 inertial measurement 41 SATCOM WGS satellite 41 Missile Warning 41 modems 41 LOFAR 41 Minotaur IV rocket 41 Reader DL# [001] 41 passive sonar 41 Iridium Satellite 41 ExoMars mission 41 hexagonal mirrors 41 Wi Fi triangulation 41 satphone 41 observing satellites 41 intelligence SIGINT 41 ESTRACK 41 Novelda Impulse Radar 41 telemetric 41 Cosmic Background Explorer COBE 41 Earth Orbit LEO 41 galaxy M# [001] 41 TCDL 41 MTSAT 41 lightwaves 41 Bushnell ONIX 41 Ulysses spacecraft 41 demodulate 41 galaxy M# [002] 41 Mars Lander 41 geodetic 41 Hubble Space Telescope HST 41 GAP INC 41 waypoint navigation 41 Scatterometer 41 High Frequency AEHF 41 Lagrangian 41 radio frequencies 41 Netted Iridium 41 NASA rovers Spirit 41 Sinosat 41 JPADS 41 Unmanned Aerial Vehicles UAVs 41 Aegis BMD Weapon 41 Theater Ballistic Missile 41 EA 6B Prowler 41 CoMP 41 Rivet Joint 41 waning gibbous 41 Next Generation Jammer 41 doppler radar 41 IPv4 protocol 41 distant supernovae 41 quantum repeaters 41 OrbView 41 German SAR Lupe 41 Simulsat 41 C 5Ms 41 Iridium Satellite LLC 41 Lovell Telescope 41 INSAT 3E 41 LRO 41 orbital maneuvers 41 GPS jammers 41 Messenger spacecraft 41 occultations 41 RQ 4N 41 Spacecraft Control 41 WorldView 41 Apstar 41 CubeSats 41 ICO G1 41 STRATCOM 41 ATIRCM 41 electromagnetic pulses 41 Joint Helmet Mounted 41 Stardust spacecraft 41 VSAT terminals 41 photometry 41 SuitSat 41 GOSAT 41 Aegis destroyers 41 gaseous planet 41 NextSat 41 EO IR sensors 41 RESOURCESAT 41 microwave frequencies 41 DSTS G 41 outermost planets 41 Forward Looking Infrared 41 GPS OCX 41 Airborne Laser 41 geo stationary 41 sensor nodes 41 interceptor missile 41 Huygens descent 41 Augmentation System 41 MEASAT 3a 41 lunar landers 41 System SBIRS 41 spectral bands 41 SkyDock 41 ATV Jules Verne 41 Terrestar 41 ASKAP 41 telescopic observations 41 Mars Orbiter Camera 41 Nexrad 41 refractors 41 hyperspectral sensors 41 MQ 8B 41 Global Hawk 41 Imaging Spectroradiometer MODIS instrument 41 Eutelsat W2A satellite 41 Marsis 41 Sniper XR 41 infrared telescope 41 STP SIV 41 lander 41 HDAM 41 Proba 2 41 Tropical Rainfall Measuring 41 airborne reconnaissance 41 earthlike planets 41 GEO IK 2 41 WAAS enabled 41 Advanced Spectroscopic Portals 41 Hubble Space telescope 41 wideband RF 41 Explorer WISE 41 laser altimetry 41 Landsat Data 41 System WAAS 41 HM Cancri 41 infrared beams 41 omni directional antenna 41 MALD 41 terrestrial analogue 41 unmanned airships 41 ASTAMIDS 41 AN/PRC-#G 41 BepiColombo 41 NASA Wilkinson Microwave 41 Airborne Topographic Mapper 41 Civics Mendel 41 Gamma ray burst 41 geo synchronous transfer 41 National Reconnaissance 41 Arecibo telescope